More than likely the magnetron tube has failed. Over 10 years old, you are out of warranty for the part. So you would be looking around $400 to fix from a repair company. You could do it for less than half of that if you have the right tools and alittle knowledge of what your doing.

I am pretty handy with tools. Is the magnetron a part that can be ordered (if so, where) and what does it look like? Do you know of a website that will give me instructions on how to replace it--maybe with diagrams or photos?

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